Lab: Endocrine System Flashcards
(45 cards)
Tendency of a living body to maintain relatively stable internal conditions in spite of changes in its external environment
Homeostasis
What is homeostasis also referred to as?
Dynamic steady state
Communication and coordination between cells to maintain homeostasis
Cell signaling
What does cell signaling involve?
- Signaling cell
- Signaling molecule
- Target cell
Primary systems involved in cellular communication
Endocrine system
Nervous system
Pores in the plasma membrane
Gap Junctions
What do gap junctions do?
Enable cells to pass nutrients, electrolytes, and signaling molecules directly from cytoplasm of one cell to the cytoplasm of another cell
Local hormones that act on the same cell the secreted them
Autrocrine cell signaling
Local hormones that act on neighboring cells
Paracrine cells
auto means
self
-crine means
to screte
Circulating hormones that target a distant cell through the bloodstream
Endocrine cell signaling
How long does it take the nervous system take to transmit?
Fast - miliseconds
How long does it take the endocrine system to transmit hormones?
Hormone travel can take seconds to days
When does nervous system transmission stop?
When the stimulus stops
When does the endocrine system stop?
May continue responding long after the stimulus stops
System of the body made up of glands, tissues, and cells that secrete hormones
Endocrine system
Function of the endocrine system
Produce and secrete hormones that regulate the activity of cells/organs to maintain homeostasis
Chemical messenger that is secreted by an endocrine gland, that travels in the blood stream, and triggers a physiological response in distance cells with receptors
Hormone
Anterior pituitary
“Adenohypophysis”
Glandular Tissue
Posterior pituitary
“Neurohypophysis”
Nervous tissue
Two hormones are synthesized in the hypothalamus and stored and secreted by the posterior pituitary
- Oxytocin
- Antidiuretic hormone
Hormone that stimulates uterine contractions and milk release during suckling
Oxytocin
Where is oxytocin produced?
Hypothalamus
